Performing Co-ordinated Turns with Articulated Wing-tips as Multi-axis Control Effectors
P Bourdin (Bristol University), A Gatto (Brunel University) & MI Friswell (Swansea University)
The Aeronautical Journal, Vol. 114, No. 1151, January 2010, pp. 35-47
This paper investigates a novel method for the control of aircraft. The concept consists of articulated split wing-tips, independently actuated and mounted on a baseline flying wing. The general philosophy behind the concept was that adequate control of a flying wing about its three axes could be obtained through local modifications of the dihedral angle at the wing-tips, thus providing an alternative to conventional control effectors such as elevons and drag rudders. Preliminary computations with a vortex lattice model and subsequent wind tunnel tests and Navier-Stokes computations demonstrate the viability of the concept for co-ordinated turns, with individual and/or combined wing-tip deflections producing multiaxis, coupled control moments. The multi-axis nature of the generated moments contribute to over-actuate the flight control system, leading to some redundancy, which could be exploited to optimise secondary objective functions such as drag or bending moment.
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Link to paper using doi: 10.1017/S0001924000003511
The Aeronautical Journal